A device and method for recycling waste circuit boards

Abstract

The invention provides a recycling treatment device and method of waste circuit boards. The recycling treatment device of waste circuit boards mainly comprises a crushing machine, a self-reduction smelting furnace, a Roots blower and an exhaust gas treatment device. The self-reduction smelting furnace is mainly composed of a smelting furnace body, a smelting spray gun, a vertically lifting flue, a cyclone separator and a combustion heat exchange tower, wherein the top of the smelting furnace body is provided with a charging port, a heat preservation gun port and a sampling port; the vertically lifting flue is connected with an inlet of the cyclone separator; an outlet of the cyclone separator is connected with the combustion heat exchange tower; an air heat exchanger is arranged inside the combustion heat exchange tower; and a hot air outlet is formed in the upper portion of the combustion heat exchange tower and connected with a smelting spray gun entering the smelting furnace through a pipeline. Through equipment transformation, process optimization and combination of recycled carbon particles as a reduction agent and recycled high-temperature process gas as heat, the recycling rate of valuable metal is effectively increased, the smoke volume of a system is reduced, energy is saved, and pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of resource recovery and recycling, in particular to a device and method for recycling waste circuit boards. Background technique [0002] At present, the recycling and treatment of waste circuit boards generally adopt methods such as direct burial, incineration, water washing and cracking, but all of them release toxic substances, which are likely to cause serious secondary pollution of the air or soil, and the national environmental protection policy does not allow this. Do or limit these processing modes. Internationally, the best way to recycle waste circuit boards is the physical method. The most notable features of this method are the advantages of low environmental pollution, high comprehensive utilization rate, and high added value. It is the development trend of electronic waste treatment in the future; The disadvantage is that the processing cost is slightly higher than the recycling mode of incin...

AI Technical Summary

Problems solved by technology

[0002] At present, the recycling and treatment of waste circuit boards generally adopt methods such as direct burial, incineration, water washing and cracking, but all of them release toxic substances, which are likely to cause serious secondary pollution of the air or soil and other environments. The national environmental protection policy does not allow this. do or restrict these processing modes

Internationally, the best way to recycle waste circuit boards is the physical method. The most notable features of this method are the advantages of low environmental pollution, high comprehensive utilization rate, and high added value. It is the development trend of electronic waste treatment in the future; The disadvantage is that the processing cost is slightly higher than the recycling mode of incineration or washing

Due to the high toughness of waste circuit boards, most of which are flat, it is difficult to separate metals and non-metals through one-time crushing, and there are many types of substances contained in it, and the separation and decomposition process is complicated. These characteristics determine the recycling of waste circuit boards. certain degree of difficulty

[0003] At present, most of the recycling and processing equipment in China are immature, and some of them are in the pilot test or experimental stage. At present, they only do the decomposition and treatment of flue gas. There is no further control equipment to reduce energy consumption. Recycling and utilization of resources, etc., lead to the existence of defects such as high energy consumption, low production capacity, and non-conformity of pollution discharge standards in these processing equipment

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